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Discuss Once tiled, how long before turning on ufh in the Tiling on Underfloor Heating area at TilersForums. USA and UK Tiling Forum

J

Jas0n

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hi,

I’m close now to finishing of the tile in my kitchen with porcelain tiles. I am looking for some advice on when it would be safe to be able to switch the ufh back on. I have used a Topps Tiles flexible rapid set https://www.tilersforums.com/forums/tile-adhesive/ but there is no guideline for when to switch the ufh back on after using there product.

Thanks

Jason
 
OP
O

Old Mod

Wait 28 days for https://www.tilersforums.com/forums/tile-adhesive/ and grouts to cure
Start the ufh at ambient temperature,
approx 15 degrees.
Increase the temperature by no more than 5 degrees a day until max temp is reached.
Leave at running temp for two days and then reduce by same 5 degrees a day until off.
Then you can use the ufh, increasing the temp over a few days.
The ufh heating should never be whacked on full from cold or from hot to Off in one go.
If the heating is likely to be off for a period of time, ie a holiday or summer months, always decrease over a few days.
Thermal shock can be caused at any time, and the most likely cause being a dramatic change in temp, from hot to cold, or vice versa.
 

Chalker

TF
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Thanks Paul, that I didn’t know. :):thumbsup:
Common mistake is that people think the floor should feel hot. It shouldn’t.
45 degrees at the manifold will give a floor temp of around 32 degrees. With timber, or a amtico floors, the temperature should be reduced even more to give a floor temp of max 29 degrees. This can be controlled with a floor probe.
Floor coverings should be considered at the design stage. And pipework design can then accommodate this .
 
OP
J

Jas0n

Thanks for the advice, I’m glad I’ve now found this out otherwise I would have turned it on. Looks like I will have to plug in a few rads in the kitchen for the next few weeks then.
As for the blending valve it has been set to max, and I don’t really want to be messing with the manifold and the stuff with it as that’s not something I’m that clued up on.
 

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